Four Charged Particles (Two Having a Charge +Q and Two

question 26

Multiple Choice

Four charged particles (two having a charge +Q and two having a charge -Q) are distributed as shown below.Each charge is equidistant from the origin.In which direction is the net electric field at the point P,which is on the y axis?

• A)directly up (in the positive y direction)
• B)directly left (negative x direction)
• C)upwards,toward the left
• D)upwards,toward the right
• E)The net field is zero,so there is no direction.

Recognize the signaling pathways involved in circadian rhythm regulation.

Describe the effects of light on circadian rhythms and the SCN's adaptation mechanisms.

Discuss the mechanisms of sleep regulation and the role of different brain waves in sleep stages.

Understand the hormonal influences on circadian rhythms and sleep.

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